2012 Mercedes Benz ML350 how to retract the electric rear parking brake HD

2012 Mercedes Benz ML350 how to retract the electric rear parking brake to replace pads. This video shows how to put the car into service mode to do this. This might work on other models but not sure witch ones. Just rember you must do it fast or it wont work. After you retracted them you still need to push the pistons back manually. BE SURE TO REEGAGED THEM AFTER YOU CHANGE THE PADS! ALSO PUMP UP THE BRAKE PEDAL BEFORE YOU DRIVE IT TO BE SURE YOU HAVE BRAKES !!!!